| /* |
| * GIT - The information manager from hell |
| * |
| * Copyright (C) Linus Torvalds, 2005 |
| */ |
| #include "cache.h" |
| #include "config.h" |
| #include "refs.h" |
| #include "builtin.h" |
| #include "exec-cmd.h" |
| #include "parse-options.h" |
| |
| #ifndef DEFAULT_GIT_TEMPLATE_DIR |
| #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates" |
| #endif |
| |
| #ifdef NO_TRUSTABLE_FILEMODE |
| #define TEST_FILEMODE 0 |
| #else |
| #define TEST_FILEMODE 1 |
| #endif |
| |
| #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH" |
| |
| static int init_is_bare_repository = 0; |
| static int init_shared_repository = -1; |
| static const char *init_db_template_dir; |
| |
| static void copy_templates_1(struct strbuf *path, struct strbuf *template_path, |
| DIR *dir) |
| { |
| size_t path_baselen = path->len; |
| size_t template_baselen = template_path->len; |
| struct dirent *de; |
| |
| /* Note: if ".git/hooks" file exists in the repository being |
| * re-initialized, /etc/core-git/templates/hooks/update would |
| * cause "git init" to fail here. I think this is sane but |
| * it means that the set of templates we ship by default, along |
| * with the way the namespace under .git/ is organized, should |
| * be really carefully chosen. |
| */ |
| safe_create_dir(path->buf, 1); |
| while ((de = readdir(dir)) != NULL) { |
| struct stat st_git, st_template; |
| int exists = 0; |
| |
| strbuf_setlen(path, path_baselen); |
| strbuf_setlen(template_path, template_baselen); |
| |
| if (de->d_name[0] == '.') |
| continue; |
| strbuf_addstr(path, de->d_name); |
| strbuf_addstr(template_path, de->d_name); |
| if (lstat(path->buf, &st_git)) { |
| if (errno != ENOENT) |
| die_errno(_("cannot stat '%s'"), path->buf); |
| } |
| else |
| exists = 1; |
| |
| if (lstat(template_path->buf, &st_template)) |
| die_errno(_("cannot stat template '%s'"), template_path->buf); |
| |
| if (S_ISDIR(st_template.st_mode)) { |
| DIR *subdir = opendir(template_path->buf); |
| if (!subdir) |
| die_errno(_("cannot opendir '%s'"), template_path->buf); |
| strbuf_addch(path, '/'); |
| strbuf_addch(template_path, '/'); |
| copy_templates_1(path, template_path, subdir); |
| closedir(subdir); |
| } |
| else if (exists) |
| continue; |
| else if (S_ISLNK(st_template.st_mode)) { |
| struct strbuf lnk = STRBUF_INIT; |
| if (strbuf_readlink(&lnk, template_path->buf, |
| st_template.st_size) < 0) |
| die_errno(_("cannot readlink '%s'"), template_path->buf); |
| if (symlink(lnk.buf, path->buf)) |
| die_errno(_("cannot symlink '%s' '%s'"), |
| lnk.buf, path->buf); |
| strbuf_release(&lnk); |
| } |
| else if (S_ISREG(st_template.st_mode)) { |
| if (copy_file(path->buf, template_path->buf, st_template.st_mode)) |
| die_errno(_("cannot copy '%s' to '%s'"), |
| template_path->buf, path->buf); |
| } |
| else |
| error(_("ignoring template %s"), template_path->buf); |
| } |
| } |
| |
| static void copy_templates(const char *template_dir) |
| { |
| struct strbuf path = STRBUF_INIT; |
| struct strbuf template_path = STRBUF_INIT; |
| size_t template_len; |
| struct repository_format template_format = REPOSITORY_FORMAT_INIT; |
| struct strbuf err = STRBUF_INIT; |
| DIR *dir; |
| char *to_free = NULL; |
| |
| if (!template_dir) |
| template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); |
| if (!template_dir) |
| template_dir = init_db_template_dir; |
| if (!template_dir) |
| template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR); |
| if (!template_dir[0]) { |
| free(to_free); |
| return; |
| } |
| |
| strbuf_addstr(&template_path, template_dir); |
| strbuf_complete(&template_path, '/'); |
| template_len = template_path.len; |
| |
| dir = opendir(template_path.buf); |
| if (!dir) { |
| warning(_("templates not found in %s"), template_dir); |
| goto free_return; |
| } |
| |
| /* Make sure that template is from the correct vintage */ |
| strbuf_addstr(&template_path, "config"); |
| read_repository_format(&template_format, template_path.buf); |
| strbuf_setlen(&template_path, template_len); |
| |
| /* |
| * No mention of version at all is OK, but anything else should be |
| * verified. |
| */ |
| if (template_format.version >= 0 && |
| verify_repository_format(&template_format, &err) < 0) { |
| warning(_("not copying templates from '%s': %s"), |
| template_dir, err.buf); |
| strbuf_release(&err); |
| goto close_free_return; |
| } |
| |
| strbuf_addstr(&path, get_git_common_dir()); |
| strbuf_complete(&path, '/'); |
| copy_templates_1(&path, &template_path, dir); |
| close_free_return: |
| closedir(dir); |
| free_return: |
| free(to_free); |
| strbuf_release(&path); |
| strbuf_release(&template_path); |
| clear_repository_format(&template_format); |
| } |
| |
| static int git_init_db_config(const char *k, const char *v, void *cb) |
| { |
| if (!strcmp(k, "init.templatedir")) |
| return git_config_pathname(&init_db_template_dir, k, v); |
| |
| if (starts_with(k, "core.")) |
| return platform_core_config(k, v, cb); |
| |
| return 0; |
| } |
| |
| /* |
| * If the git_dir is not directly inside the working tree, then git will not |
| * find it by default, and we need to set the worktree explicitly. |
| */ |
| static int needs_work_tree_config(const char *git_dir, const char *work_tree) |
| { |
| if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git")) |
| return 0; |
| if (skip_prefix(git_dir, work_tree, &git_dir) && |
| !strcmp(git_dir, "/.git")) |
| return 0; |
| return 1; |
| } |
| |
| void initialize_repository_version(int hash_algo) |
| { |
| char repo_version_string[10]; |
| int repo_version = GIT_REPO_VERSION; |
| |
| #ifndef ENABLE_SHA256 |
| if (hash_algo != GIT_HASH_SHA1) |
| die(_("The hash algorithm %s is not supported in this build."), hash_algos[hash_algo].name); |
| #endif |
| |
| if (hash_algo != GIT_HASH_SHA1) |
| repo_version = GIT_REPO_VERSION_READ; |
| |
| /* This forces creation of new config file */ |
| xsnprintf(repo_version_string, sizeof(repo_version_string), |
| "%d", repo_version); |
| git_config_set("core.repositoryformatversion", repo_version_string); |
| |
| if (hash_algo != GIT_HASH_SHA1) |
| git_config_set("extensions.objectformat", |
| hash_algos[hash_algo].name); |
| } |
| |
| static int create_default_files(const char *template_path, |
| const char *original_git_dir, |
| const struct repository_format *fmt) |
| { |
| struct stat st1; |
| struct strbuf buf = STRBUF_INIT; |
| char *path; |
| char junk[2]; |
| int reinit; |
| int filemode; |
| struct strbuf err = STRBUF_INIT; |
| |
| /* Just look for `init.templatedir` */ |
| init_db_template_dir = NULL; /* re-set in case it was set before */ |
| git_config(git_init_db_config, NULL); |
| |
| /* |
| * First copy the templates -- we might have the default |
| * config file there, in which case we would want to read |
| * from it after installing. |
| * |
| * Before reading that config, we also need to clear out any cached |
| * values (since we've just potentially changed what's available on |
| * disk). |
| */ |
| copy_templates(template_path); |
| git_config_clear(); |
| reset_shared_repository(); |
| git_config(git_default_config, NULL); |
| |
| /* |
| * We must make sure command-line options continue to override any |
| * values we might have just re-read from the config. |
| */ |
| is_bare_repository_cfg = init_is_bare_repository; |
| if (init_shared_repository != -1) |
| set_shared_repository(init_shared_repository); |
| |
| /* |
| * We would have created the above under user's umask -- under |
| * shared-repository settings, we would need to fix them up. |
| */ |
| if (get_shared_repository()) { |
| adjust_shared_perm(get_git_dir()); |
| } |
| |
| /* |
| * We need to create a "refs" dir in any case so that older |
| * versions of git can tell that this is a repository. |
| */ |
| safe_create_dir(git_path("refs"), 1); |
| adjust_shared_perm(git_path("refs")); |
| |
| if (refs_init_db(&err)) |
| die("failed to set up refs db: %s", err.buf); |
| |
| /* |
| * Create the default symlink from ".git/HEAD" to the "master" |
| * branch, if it does not exist yet. |
| */ |
| path = git_path_buf(&buf, "HEAD"); |
| reinit = (!access(path, R_OK) |
| || readlink(path, junk, sizeof(junk)-1) != -1); |
| if (!reinit) { |
| if (create_symref("HEAD", "refs/heads/master", NULL) < 0) |
| exit(1); |
| } |
| |
| initialize_repository_version(fmt->hash_algo); |
| |
| /* Check filemode trustability */ |
| path = git_path_buf(&buf, "config"); |
| filemode = TEST_FILEMODE; |
| if (TEST_FILEMODE && !lstat(path, &st1)) { |
| struct stat st2; |
| filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) && |
| !lstat(path, &st2) && |
| st1.st_mode != st2.st_mode && |
| !chmod(path, st1.st_mode)); |
| if (filemode && !reinit && (st1.st_mode & S_IXUSR)) |
| filemode = 0; |
| } |
| git_config_set("core.filemode", filemode ? "true" : "false"); |
| |
| if (is_bare_repository()) |
| git_config_set("core.bare", "true"); |
| else { |
| const char *work_tree = get_git_work_tree(); |
| git_config_set("core.bare", "false"); |
| /* allow template config file to override the default */ |
| if (log_all_ref_updates == LOG_REFS_UNSET) |
| git_config_set("core.logallrefupdates", "true"); |
| if (needs_work_tree_config(original_git_dir, work_tree)) |
| git_config_set("core.worktree", work_tree); |
| } |
| |
| if (!reinit) { |
| /* Check if symlink is supported in the work tree */ |
| path = git_path_buf(&buf, "tXXXXXX"); |
| if (!close(xmkstemp(path)) && |
| !unlink(path) && |
| !symlink("testing", path) && |
| !lstat(path, &st1) && |
| S_ISLNK(st1.st_mode)) |
| unlink(path); /* good */ |
| else |
| git_config_set("core.symlinks", "false"); |
| |
| /* Check if the filesystem is case-insensitive */ |
| path = git_path_buf(&buf, "CoNfIg"); |
| if (!access(path, F_OK)) |
| git_config_set("core.ignorecase", "true"); |
| probe_utf8_pathname_composition(); |
| } |
| |
| strbuf_release(&buf); |
| return reinit; |
| } |
| |
| static void create_object_directory(void) |
| { |
| struct strbuf path = STRBUF_INIT; |
| size_t baselen; |
| |
| strbuf_addstr(&path, get_object_directory()); |
| baselen = path.len; |
| |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_setlen(&path, baselen); |
| strbuf_addstr(&path, "/pack"); |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_setlen(&path, baselen); |
| strbuf_addstr(&path, "/info"); |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_release(&path); |
| } |
| |
| static void separate_git_dir(const char *git_dir, const char *git_link) |
| { |
| struct stat st; |
| |
| if (!stat(git_link, &st)) { |
| const char *src; |
| |
| if (S_ISREG(st.st_mode)) |
| src = read_gitfile(git_link); |
| else if (S_ISDIR(st.st_mode)) |
| src = git_link; |
| else |
| die(_("unable to handle file type %d"), (int)st.st_mode); |
| |
| if (rename(src, git_dir)) |
| die_errno(_("unable to move %s to %s"), src, git_dir); |
| } |
| |
| write_file(git_link, "gitdir: %s", git_dir); |
| } |
| |
| static void validate_hash_algorithm(struct repository_format *repo_fmt, int hash) |
| { |
| const char *env = getenv(GIT_DEFAULT_HASH_ENVIRONMENT); |
| /* |
| * If we already have an initialized repo, don't allow the user to |
| * specify a different algorithm, as that could cause corruption. |
| * Otherwise, if the user has specified one on the command line, use it. |
| */ |
| if (repo_fmt->version >= 0 && hash != GIT_HASH_UNKNOWN && hash != repo_fmt->hash_algo) |
| die(_("attempt to reinitialize repository with different hash")); |
| else if (hash != GIT_HASH_UNKNOWN) |
| repo_fmt->hash_algo = hash; |
| else if (env) { |
| int env_algo = hash_algo_by_name(env); |
| if (env_algo == GIT_HASH_UNKNOWN) |
| die(_("unknown hash algorithm '%s'"), env); |
| repo_fmt->hash_algo = env_algo; |
| } |
| } |
| |
| int init_db(const char *git_dir, const char *real_git_dir, |
| const char *template_dir, int hash, unsigned int flags) |
| { |
| int reinit; |
| int exist_ok = flags & INIT_DB_EXIST_OK; |
| char *original_git_dir = real_pathdup(git_dir, 1); |
| struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
| |
| if (real_git_dir) { |
| struct stat st; |
| |
| if (!exist_ok && !stat(git_dir, &st)) |
| die(_("%s already exists"), git_dir); |
| |
| if (!exist_ok && !stat(real_git_dir, &st)) |
| die(_("%s already exists"), real_git_dir); |
| |
| set_git_dir(real_git_dir, 1); |
| git_dir = get_git_dir(); |
| separate_git_dir(git_dir, original_git_dir); |
| } |
| else { |
| set_git_dir(git_dir, 1); |
| git_dir = get_git_dir(); |
| } |
| startup_info->have_repository = 1; |
| |
| /* Just look for `core.hidedotfiles` */ |
| git_config(git_init_db_config, NULL); |
| |
| safe_create_dir(git_dir, 0); |
| |
| init_is_bare_repository = is_bare_repository(); |
| |
| /* Check to see if the repository version is right. |
| * Note that a newly created repository does not have |
| * config file, so this will not fail. What we are catching |
| * is an attempt to reinitialize new repository with an old tool. |
| */ |
| check_repository_format(&repo_fmt); |
| |
| validate_hash_algorithm(&repo_fmt, hash); |
| |
| reinit = create_default_files(template_dir, original_git_dir, &repo_fmt); |
| |
| create_object_directory(); |
| |
| if (get_shared_repository()) { |
| char buf[10]; |
| /* We do not spell "group" and such, so that |
| * the configuration can be read by older version |
| * of git. Note, we use octal numbers for new share modes, |
| * and compatibility values for PERM_GROUP and |
| * PERM_EVERYBODY. |
| */ |
| if (get_shared_repository() < 0) |
| /* force to the mode value */ |
| xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository()); |
| else if (get_shared_repository() == PERM_GROUP) |
| xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP); |
| else if (get_shared_repository() == PERM_EVERYBODY) |
| xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY); |
| else |
| BUG("invalid value for shared_repository"); |
| git_config_set("core.sharedrepository", buf); |
| git_config_set("receive.denyNonFastforwards", "true"); |
| } |
| |
| if (!(flags & INIT_DB_QUIET)) { |
| int len = strlen(git_dir); |
| |
| if (reinit) |
| printf(get_shared_repository() |
| ? _("Reinitialized existing shared Git repository in %s%s\n") |
| : _("Reinitialized existing Git repository in %s%s\n"), |
| git_dir, len && git_dir[len-1] != '/' ? "/" : ""); |
| else |
| printf(get_shared_repository() |
| ? _("Initialized empty shared Git repository in %s%s\n") |
| : _("Initialized empty Git repository in %s%s\n"), |
| git_dir, len && git_dir[len-1] != '/' ? "/" : ""); |
| } |
| |
| free(original_git_dir); |
| return 0; |
| } |
| |
| static int guess_repository_type(const char *git_dir) |
| { |
| const char *slash; |
| char *cwd; |
| int cwd_is_git_dir; |
| |
| /* |
| * "GIT_DIR=. git init" is always bare. |
| * "GIT_DIR=`pwd` git init" too. |
| */ |
| if (!strcmp(".", git_dir)) |
| return 1; |
| cwd = xgetcwd(); |
| cwd_is_git_dir = !strcmp(git_dir, cwd); |
| free(cwd); |
| if (cwd_is_git_dir) |
| return 1; |
| /* |
| * "GIT_DIR=.git or GIT_DIR=something/.git is usually not. |
| */ |
| if (!strcmp(git_dir, ".git")) |
| return 0; |
| slash = strrchr(git_dir, '/'); |
| if (slash && !strcmp(slash, "/.git")) |
| return 0; |
| |
| /* |
| * Otherwise it is often bare. At this point |
| * we are just guessing. |
| */ |
| return 1; |
| } |
| |
| static int shared_callback(const struct option *opt, const char *arg, int unset) |
| { |
| BUG_ON_OPT_NEG(unset); |
| *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP; |
| return 0; |
| } |
| |
| static const char *const init_db_usage[] = { |
| N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"), |
| NULL |
| }; |
| |
| /* |
| * If you want to, you can share the DB area with any number of branches. |
| * That has advantages: you can save space by sharing all the SHA1 objects. |
| * On the other hand, it might just make lookup slower and messier. You |
| * be the judge. The default case is to have one DB per managed directory. |
| */ |
| int cmd_init_db(int argc, const char **argv, const char *prefix) |
| { |
| const char *git_dir; |
| const char *real_git_dir = NULL; |
| const char *work_tree; |
| const char *template_dir = NULL; |
| unsigned int flags = 0; |
| const char *object_format = NULL; |
| int hash_algo = GIT_HASH_UNKNOWN; |
| const struct option init_db_options[] = { |
| OPT_STRING(0, "template", &template_dir, N_("template-directory"), |
| N_("directory from which templates will be used")), |
| OPT_SET_INT(0, "bare", &is_bare_repository_cfg, |
| N_("create a bare repository"), 1), |
| { OPTION_CALLBACK, 0, "shared", &init_shared_repository, |
| N_("permissions"), |
| N_("specify that the git repository is to be shared amongst several users"), |
| PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0}, |
| OPT_BIT('q', "quiet", &flags, N_("be quiet"), INIT_DB_QUIET), |
| OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"), |
| N_("separate git dir from working tree")), |
| OPT_STRING(0, "object-format", &object_format, N_("hash"), |
| N_("specify the hash algorithm to use")), |
| OPT_END() |
| }; |
| |
| argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0); |
| |
| if (real_git_dir && !is_absolute_path(real_git_dir)) |
| real_git_dir = real_pathdup(real_git_dir, 1); |
| |
| if (template_dir && *template_dir && !is_absolute_path(template_dir)) |
| template_dir = absolute_pathdup(template_dir); |
| |
| if (argc == 1) { |
| int mkdir_tried = 0; |
| retry: |
| if (chdir(argv[0]) < 0) { |
| if (!mkdir_tried) { |
| int saved; |
| /* |
| * At this point we haven't read any configuration, |
| * and we know shared_repository should always be 0; |
| * but just in case we play safe. |
| */ |
| saved = get_shared_repository(); |
| set_shared_repository(0); |
| switch (safe_create_leading_directories_const(argv[0])) { |
| case SCLD_OK: |
| case SCLD_PERMS: |
| break; |
| case SCLD_EXISTS: |
| errno = EEXIST; |
| /* fallthru */ |
| default: |
| die_errno(_("cannot mkdir %s"), argv[0]); |
| break; |
| } |
| set_shared_repository(saved); |
| if (mkdir(argv[0], 0777) < 0) |
| die_errno(_("cannot mkdir %s"), argv[0]); |
| mkdir_tried = 1; |
| goto retry; |
| } |
| die_errno(_("cannot chdir to %s"), argv[0]); |
| } |
| } else if (0 < argc) { |
| usage(init_db_usage[0]); |
| } |
| if (is_bare_repository_cfg == 1) { |
| char *cwd = xgetcwd(); |
| setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0); |
| free(cwd); |
| } |
| |
| if (object_format) { |
| hash_algo = hash_algo_by_name(object_format); |
| if (hash_algo == GIT_HASH_UNKNOWN) |
| die(_("unknown hash algorithm '%s'"), object_format); |
| } |
| |
| if (init_shared_repository != -1) |
| set_shared_repository(init_shared_repository); |
| |
| /* |
| * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR |
| * without --bare. Catch the error early. |
| */ |
| git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT)); |
| work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT)); |
| if ((!git_dir || is_bare_repository_cfg == 1) && work_tree) |
| die(_("%s (or --work-tree=<directory>) not allowed without " |
| "specifying %s (or --git-dir=<directory>)"), |
| GIT_WORK_TREE_ENVIRONMENT, |
| GIT_DIR_ENVIRONMENT); |
| |
| /* |
| * Set up the default .git directory contents |
| */ |
| if (!git_dir) |
| git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; |
| |
| if (is_bare_repository_cfg < 0) |
| is_bare_repository_cfg = guess_repository_type(git_dir); |
| |
| if (!is_bare_repository_cfg) { |
| const char *git_dir_parent = strrchr(git_dir, '/'); |
| if (git_dir_parent) { |
| char *rel = xstrndup(git_dir, git_dir_parent - git_dir); |
| git_work_tree_cfg = real_pathdup(rel, 1); |
| free(rel); |
| } |
| if (!git_work_tree_cfg) |
| git_work_tree_cfg = xgetcwd(); |
| if (work_tree) |
| set_git_work_tree(work_tree); |
| else |
| set_git_work_tree(git_work_tree_cfg); |
| if (access(get_git_work_tree(), X_OK)) |
| die_errno (_("Cannot access work tree '%s'"), |
| get_git_work_tree()); |
| } |
| else { |
| if (work_tree) |
| set_git_work_tree(work_tree); |
| } |
| |
| UNLEAK(real_git_dir); |
| UNLEAK(git_dir); |
| UNLEAK(work_tree); |
| |
| flags |= INIT_DB_EXIST_OK; |
| return init_db(git_dir, real_git_dir, template_dir, hash_algo, flags); |
| } |